(A) No person shall discharge or permit to be discharged into any public sewer any of the following wastes:
(1) Any wastewater having a temperature greater than 150°F (65.6°C), or causing, individually or in combination with other wastewater, the influent at the wastewater treatment plant to have a temperature exceeding 104°F (40°C);
(2) Any water or waste having a biological oxygen demand exceeding 1,000 parts per million by weight for any 24-hour period;
(3) Any gasoline, benzene, naphtha, fuel oil, kerosene, toluene, xylene, ethers, alcohols, ketones, aldehydes, peroxides, chlorates, bromates, carbides, hydrides or sulfides, or other flammable or explosive liquid, solid or gas;
(4) Any garbage that has not been properly shredded to particles of one-half inch or less in any dimension;
(5) Any ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, manure, grit, brick, cement, onyx, carbide, animal guts or tissues, paunch, manure, bones, hair, hides of fleshings, entrails, whole blood, spent lime, stone or marble dust, straw shavings, grass clippings, spent grains, spent hops, waste paper, asphalt residues, residues from refining or processing of fuel or lubricating oil, mud or glass grinding or polishing wastes, or other matter that may interfere with the proper operation of the sewers or sewage treatment plant;
(6) Any water or waste having a pH lower than 5.0 or higher than 9.5 or having any other corrosive property capable of causing damage or hazard to structures, equipment or personnel of the sewage works;
(7) Any water or waste containing a toxic or poisonous substance in sufficient quantities to constitute a hazard to humans or animals, injure or interfere with sewage treatment or create any hazard in the receiving waters of the sewage treatment plant;
(8) Non-contact cooling water or unpolluted storm or ground water;
(9) Any noxious or malodorous gas or substance capable of creating a public nuisance;
(10) Any water or wastes containing strong acid, iron, pickling wastes or concentrated plating solution, whether neutralized or not;
(11) Any waters or wastes containing iron, chromium, copper zinc and similar objectionable or toxic substances; or wastes exerting an excessive chlorine requirement, to a degree that the material
received in the composite sewage at the sewage treatment works exceeds the limits established by the Council for the materials; and
(12) Materials which exert or cause unusual BOD, chemical oxygen demand or chlorine requirements in such quantities as to constitute a significant load on the sewage treatment works, and unusual volume of low or concentration of wastes constituting “slugs”, as defined herein.
(B) Waters or wastes containing substances which are not amenable to treatment or reduction by the sewage treatment processes employed, or are amenable to treatment only to a degree that the sewage treatment plant effluent cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving waters.
(C) National categorical pretreatment standards promulgated by the U.S. Environmental Protection Agency (EPA) shall be met by all uses which are subject to such standards unless otherwise modified in accordance with applicable state statutes or EPA regulations.
(D) No user shall increase the use of process water or, in any way, attempt to dilute a discharge as a partial or complete substitute for adequate treatment to achieve compliance with the limitations contained herein, contained in the national categorical pretreatment standards or contained in any state requirement.
(E) Sludges, floats, skimmings and the like generated by an industrial or commercial pretreatment system shall not be placed into the city’s sewage works. The sludges shall be contained, transported and disposed of in accordance with all federal, state and local regulations.
(Prior Code, § 3.21) Penalty, see § 10.99